Division .4 F1
United Kingdom
In general, portable CO 2 fire extinguishers shall not be located in accommodation spaces. Where such extinguishers are provided in radio rooms, at switchboards and other similar positions, the volume of any space containing one or more extinguishers shall be such as to limit the concentration of vapour that can occur due to discharge to not more than 5 % of the net volume of the space for the purpose of this Regulation. The volume of CO 2 shall be calculated at 0,56 m 3 /kg.